The influence of cement fineness on early-age properties of cement-based materials is investigated using a variety of experimental techniques. Properties that are critical to the earlyage performance of these materials are tested, including heat release, temperature rise, chemical shrinkage and autogenous deformation. Measurements of these properties for two cements of widely different fineness...

Moisture flow in porous media is the driving force behind early age drying shrinkage. Fracture in the interfacial transition zone (ITZ), between cement paste and aggregateinclusion, is related to restraint caused by, among others, aggregates that obstruct free deformation of the paste. Environmental Scanning Electron Microscope (ESEM) test results are used as a base for the developed method for...

The effects of polypropylene fibres on mortar and cement-paste cracking were investigated using different amounts fibre fractions eccentric rings under restrained-shrinkage conditions. Eccentric-ring tests conducted to investigate early-age shrinkage cracks. characteristics restricted cementitious materials described by evaluating the time concrete mixtures that are less likely crack. Different...

The early age microcracking is a significant problem in concrete structures resulting increased permeability and decreased durability. previous work showed that Sporasarcina pasteurii cells immobilized on natural minerals such as bentonite, diatomaceous earth, sepiolite, pumice effectively remediated early-age microcracks the cementitious systems by triggering microbial-induced calcite precipit...